A) 98 W
B) 125 W
C) 175 W
D) 200 W
Correct Answer: A
Solution :
Given, \[v=7.2\,km{{h}^{-1}}\] \[=7.2\times \frac{5}{18}=2\,m\text{/}s\] Slope is given 1 in 20 i.e, \[\sin \theta =\frac{1}{20}\] For the upward motion to the cyclist. \[F=mg\,\sin \theta \] \[\therefore \] Power of the man, \[P=F\times v=mg\,\sin \theta \times v\] \[=100\times 9.8\times \frac{1}{20}\times 2=98\,W\]You need to login to perform this action.
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